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Home >> Chevrolet >> 2007 >> Optra LT, Automatic >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> Engine Mechanical - 1.8L (L79) >> Repair Instructions >> Exhaust Manifold Removal >> Removal Procedure

Removal Procedure

    Fig 1: View Of Exhaust Manifold Heat Shield And Bolts
    GM1289839Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Battery Disconnect Caution .
    NOTE: Handle the oxygen sensors carefully in order to prevent damage to the component. Keep the electrical connector and the exhaust inlet end free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor.
  1. Disconnect the negative battery cable.
  2. Disconnect the oxygen sensor (O2S) connector, if equipped.
  3. Remove the exhaust manifold heat shield bolts.
  4. Remove the exhaust manifold heat shield.
    5. Fig 2: View Of Exhaust Flex Pipe And Retaining Nuts
    GM1289778Courtesy of GENERAL MOTORS CORP.
  5. Remove the exhaust flex pipe retaining nuts from the exhaust manifold studs.
    6. Fig 3: View Of Exhaust Manifold Retaining Nut Removal Sequence
    GM1289841Courtesy of GENERAL MOTORS CORP.
  6. Remove the exhaust manifold retaining nuts in the sequence shown.
  7. Remove the exhaust manifold.
  8. Remove the exhaust manifold gasket.
  9. Clean the sealing surfaces of the exhaust manifold and the cylinder head.
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